Hollow stopper fits into the neck of the glassware apparatus. Series 774261 may be used at up to 125°C for up to 8 hours.
- Plug-type stopper with sleeve extension fits into the neck of the apparatus for a secure seal
- Diaphragm can be punctured with a syringe needle
- Use for outgassing NMR sample tubes, as a pressure vent or for adding reactant via a syringe